The capacity (size) of the hard disk determines how much data the disc can accommodate.

Width

49.55 mm (4.96 cm)

135 mm (13.5 cm)

Height

9.6 mm (0.96 cm)

203 mm (20.3 cm)

Depth

8.85 mm (0.89 cm)

140 mm (14 cm)

White (4)

Black (31)

Red (5)

Blue (8)

Orange (8)

Silver (5)

Grey (2)

Green (1)

Gold (2)

Yellow (3)

External interface

USB 2.0 (36)

USB 3.0 (3.1 gen1) (63)

USB 3.1 (3.1 gen2) (7)

USB-C (9)

FireWire (1)

Thunderbolt (3)

WiFi (2)

Determines the way in which the hard drive is connected to the computer, namely the type of connector through which the drive connects to the device. Each type of connection is unique, and in most cases these connections are not interchangeable.

Internal interface

SATA III (1)

Determines the way in which the hard drive is connected to the computer, namely the type of connector through which the drive connects to the device. Each type of connection is unique, and in most cases these connections are not interchangeable.

Read Speed

90 MB/s

2,800 MB/s

Memory cache

8 MB

64 MB

Write speed

90 MB/s

1,300 MB/s

HDD rotational speed

5,400 RPM (3)

Different hard drives spin at different rates. Simply put, the faster the drive can spin, the faster the reading mechanism manages to read (store) information.